Consider the following potential allocations in an economy with three people: a=(7,5,7), b=(3,11,4), and c=(1,4,6). According to Pareto efficiency, which of these allocations is the best?
1) Allocation a=(7,5,7)
2) Allocation b=(3,11,4)
3) Allocation c=(1,4,6)
4) None of the above